Defense titans Boeing and Lockheed Martin have put on hold a teaming agreement to develop the Air Force's Next-Generation Bomber, one top industry official said today. The decision to put the partnering agreement on hold comes as Boeing has made substantial progress on its "Phantom Ray" unmanned combat aircraft. At the same time, the Pentagon has pushed back the fielding date of a new bomber by a number of years and is now reviewing the types of aircraft and other...